Introducing Java support in Trusty: Find safe Maven open source packages for your next Java project

We're excited to announce support for Java packages with the latest release of Trusty! Knowing whether an open source package is being actively maintained before you import it into your application is vital to reduce unnecessary exposure to maintainability and security risks. Here’s how Trusty’s activity score can help Java developers make better dependency choices.

Author: Brian Dussault
4 mins read
Dec 20, 2023

Java support in Trusty: Our holiday gift to you!

In the Java ecosystem, it’s common for applications to rely on hundreds of third-party dependencies. It’s a heavy lift for developers to evaluate all of those dependencies to make sure they’re being actively maintained and that they aren’t “abandonware” or malicious. But that evaluation is critical, because according to Sonatype's 9th Annual State of the Software Supply Chain report, "a significant portion (approximately 85%) of projects hosted on Maven Central are considered inactive, with fewer than 500 monthly downloads." 

With Trusty’s support for Maven packages, we can do that evaluation work for you. Trusty can help you more easily make data-driven decisions about which dependencies to use for your Java projects. 

Let’s walk through the steps of how to use Trusty to vet Maven open source packages. 

Finding Maven OSS packages

First, head to and select Maven (Java) from the dropdown:

To find your target package, type your Maven coordinates in the format (groupId:artifactId) in the “Search Package” field. I’m a big fan of Spring Boot, so let’s start with a search for “org.springframework.boot:spring-boot”. Trusty will return the following results, sorted by highest Trusty score that matches the search string:

Trusty - Spring Boot search results

Navigating to the first entry, "org.springframework.boot:spring-boot," you can see detailed insight into the package:

Spring Boot results in Trusty

Scoring Maven packages

Trusty’s scoring reflects the vitality of the Spring Boot community, with an impressive Trusty Score of 8.9. Let’s break that scoring down a bit. Our scoring system is based on a statistical model that analyzes public data about repos and authors on GitHub, including data for malicious packages, which tend to have low repo and author activity. It ranks packages linearly based on that data, providing a cumulative Trusty Score and individual scores for repo and author activity.  

A Trusty Score of ‘5’ is the median, and ‘9’ would be in the 90th percentile (i.e., better than 90% of known packages). You can learn more about how Trusty Scoring is calculated here. We plan to introduce other dimensions for scoring beyond activity in the future.

Provenance and Other Safety Checks

Below the Trusty Score, you’ll see other package information, including Provenance and Shared Repositories.

With the Provenance section, we want to help you validate that a package is truly what it says it is, and can be traced back to its source repo. The open source project Sigstore makes it easy for developers to sign and verify their artifacts to establish provenance. The Maven ecosystem currently doesn’t support source of origin or build provenance verification, so we can’t provide this information for Maven packages—yet. The good news is that there is quite a bit of activity in the Java community to support Sigstore, so we hope to be able to add this information soon. 

Shared Repositories helps you understand whether there are multiple packages pointing to the same repo. It’s common for malicious actors to create packages that “masquerade” as more popular ones, using their metadata and pointing to their repo (see an example here). This feature helps flag when that is happening. However, this is less concerning for Maven Central users when compared to other package management ecosystems that Trusty supports. This is because Sonatype, the organization responsible for Maven Central, effectively validates package metadata and verifies the source of origin. (You can find details of the validation checks that are performed here.)

Next Steps 

Now that we’ve vetted Spring Boot and we have confidence that it’s an active and safe package, we might want to explore various web templating technologies to add to a Spring Boot application. The following table highlights the Trusty scores for a few popular templating frameworks we could use:

Trusty Link

Trusty Score

Groovy Templates




JMustache Templates


You can use Trusty’s scoring alongside your specific functional or technical requirements to make more informed dependency choices.  

Trusty is still experimental, and we would love your feedback! To get started, head to and give your favorite Java packages a search, then join us on Discord to share your thoughts and feedback!

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